Variation of the parameters of natural reproduction and Crow’s indices in the ethnic groups of Dagestan

Курбатова, О. Л.; Pobedonostseva, E. Yu.; Gurgenova, Farida; Bulaeva, K. B.

doi:10.1134/s1022795412100043

Cited by 8 publications

(7 citation statements)

References 4 publications

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“…The vital characteristics of a population make it possible to estimate the pressure of natural selection, with the weakening of which the genetic load increases. According to [7], [10], [11], [15] in Ukrainian populations, the intensity of natural selection weakens from generation to generation, as in other developed countries with a low mortality rate [16], [17]. The Crow's index in Lutsk population decreased from 0.26 in the first generation to 0.20 in the second (Table III).…”

Section: A Reproductive Characteristics and Selection Index In Two Generationsmentioning

confidence: 99%

Indexes of Natural Selection, Migration and Reproductive Characteristics in Lutsk Population, West Ukraine

Kozak

Atramentova

2021

EJDEVELOP

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In human populations natural selection is shifting to the side of prenatal development and appears as negative outcomes of pregnancies such as spontaneous abortions, ectopic pregnancies and stillbirths. Therefore, it is important to study dynamics of changes in reproductive characteristics and selection indexes of the populations in order to predict possible problems and numbers of genetic burden in the populations. Ukraine is poorly studied in this area. The aim of the study was to investigate indicators which characterize the population structure of Lutsk city, the intensity of natural selection, migration and their dynamics in two generations. 583 post-reproductive age females were anonymously questioned. Age, places of birth of the couple, the number of pregnancies and their outcomes were considered. Results show that natural selection indexes (Crow’s indexes) are decreasing from the first generation (0,26) to the second (0,20). Migration coefficients in the population of Lutsk decreased from 0.89 to 0.82 per generation and show intensive urbanization of the city for the studied time. The efficiency of the migration is low, since the biggest number of migrants come from the villages of the Volyn region (45% for first generations and 64% for the second one), or adjacent regions of Ukraine (35% and 27%, respectively). The population of Lutsk has a narrowed type of reproduction, where average number of offspring per female equal 1,86 for the first generation and 1,73 for the second generation.

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Section: A Reproductive Characteristics and Selection Index In Two Generationsmentioning

confidence: 99%

Indexes of Natural Selection, Migration and Reproductive Characteristics in Lutsk Population, West Ukraine

Kozak

Atramentova

2021

EJDEVELOP

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“…2). У женщин группы «другие» беременностей немного меньше (3,5), но живорождений у них больше (1,7), чем у украинок (1,6) и русских (1,5 Примечания: х -среднее арифметическое, s х -ошибка среднего арифметического, Образование. Доля воспроизводимого генофонда у женщин с высшим образованием (90 %) немного ниже, чем у женщин со средним образованием (92 %, табл.…”

Section: результаты и обсуждениеunclassified

“…С развитием цивилизации общий показатель отбора (I tot ) снижается за счѐт уменьшения дифференциальной смертности (I m ). При этом изменяется соотношение индекса дифференциальной смертности и плодовитости I f [1][2][3][4][5][6]. Население Украины мало исследовано с позиций популяционной генетики.…”

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Crow’s index in ethnic and social groups of urban population

Kozak¹,

Atramentova²

2019

Fakt. eksp. evol. org.

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Aim. According to the data characterizing reproductive behavior of women, assess an impact of ethnicity and level of education on the intensity of selection in the urbanized multinational population of Kharkiv city. Methods. Data from obstetric history of 532 post-reproductive age women was studied. Results. For indicators of the number of pregnancies with favorable and unfavorable outcomes, universally valid statistical indicators were calculated. Crow’s indexes were calculated as indicators of the intensity of selection. The total selection index for Ukrainians living in Kharkiv equal 0.26, for Russians it is 0.32, and for the group formed from representatives of rare nationalities this index is 0.75. In a group of women with secondary education total selection index is 0.26, in a group with highest education it is 0.35. Conclusions. Ethnicity and level of education of women affects reproductive behavior and determine number of pregnancies and their outcomes. Selection indexes differ in ethnic groups and in groups with different levels of education. Keywords: reproductive characteristics, Kharkiv population, Crow's index, selection, nationality, education.

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“…Отбор проявляет себя на пренатальных стадиях в виде потерь беременностей, а в постнатальном периоде как детская смертность [3]. Уровень развития медицины позволяет контролировать рождаемость, более того, с помощью таких технологий, как ЭКО-оплодотворение, можно проследить, как меняются показатели отбора.…”

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Dynamics of natural selection in two generations (on the example of the population of the Kirovograd region)

Kovleva¹,

Kozak²

2021

Fakt. eksp. evol. org.

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Aim. In connection with the success of modern medicine, the pressure of natural selection in various civilized human populations is weakening, which leads to the accumulation of a genetic load. The purpose of this work was to trace the change in the intensity of natural selection among population of the Kirovograd region in two successive generations. Methods. The collection of material was carried out in 2020 and 2021. Anonymous questionnaires were conducted and medical histories of women of post-reproductive age of the Kirovograd region were studied. The first generation included 40 women born in 1937–1959; the second generation consists of 273 women born in 1960–1981. Results. The total selection index was 0.27 in the first generation, and 0.37 in the second generation. The percentage of women who have not had pregnancies increased from the first generation to the second from 2.5 to 3.7, respectively. Conclusions. The index of total selection in the Kirovograd region population for one generation increased by almost one and a half times (from 0.27 to 0.37), as well as the index of differential fertility (from 0.25 to 0.35). Keywords: reproductive characteristics, Kirovograd population, Crow's index, selection, generations.

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Variation of the parameters of natural reproduction and Crow’s indices in the ethnic groups of Dagestan

Cited by 8 publications

References 4 publications

Indexes of Natural Selection, Migration and Reproductive Characteristics in Lutsk Population, West Ukraine

Indexes of Natural Selection, Migration and Reproductive Characteristics in Lutsk Population, West Ukraine

Crow’s index in ethnic and social groups of urban population

Dynamics of natural selection in two generations (on the example of the population of the Kirovograd region)

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